<template>
  <div class="form-designer">
    <el-container>
      <!-- 左侧字段 -->
      <el-aside :width="leftWidth">
        <div class="fields-list">
          <template v-if="customFields && customFields.length > 0">
            <template
              v-if="
                customFields[0].title &&
                customFields[0].list &&
                customFields[0].list.length > 0
              "
            >
              <template v-for="(field, index) in customFields">
                <div class="field-title" :key="'f_' + index">
                  {{ field.title }}
                </div>
                <draggable
                  tag="ul"
                  :list="field.list"
                  :group="{ name: 'form', pull: 'clone', put: false }"
                  ghost-class="ghost"
                  :sort="false"
                  :key="'d_' + index"
                >
                  <template v-for="(item, cIndex) in field.list">
                    <li class="field-label" :key="'c_' + cIndex">
                      <a @click="handleFieldClick(item)">
                        <i class="icon iconfont" :class="item.icon"></i>
                        <span>{{ item.title || item.label }}</span>
                      </a>
                    </li>
                  </template>
                </draggable>
              </template>
            </template>
            <template v-else>
              <el-link
                class="field-title"
                :underline="false"
                href="https://github.com/sscfaith/avue-form-design/blob/master/CHANGELOG.md#2020-09-22"
                target="_blank"
                >自定义字段 <i class="el-icon-question"></i
              ></el-link>
              <draggable
                tag="ul"
                :list="customFields"
                :group="{ name: 'form', pull: 'clone', put: false }"
                ghost-class="ghost"
                :sort="false"
              >
                <template v-for="(item, index) in customFields">
                  <el-tooltip
                    v-if="item.tips"
                    effect="dark"
                    :content="item.tips"
                    :key="index"
                  >
                    <li class="field-label" :key="index">
                      <a style="padding: 0 5px" @click="handleFieldClick(item)">
                        <i :class="item.icon"></i>
                        <span style="margin-left: 5px">{{
                          item.title || item.label
                        }}</span>
                      </a>
                    </li>
                  </el-tooltip>
                  <li v-else class="field-label" :key="index">
                    <a style="padding: 0 5px" @click="handleFieldClick(item)">
                      <i :class="item.icon"></i>
                      <span style="margin-left: 5px">{{
                        item.title || item.label
                      }}</span>
                    </a>
                  </li>
                </template>
              </draggable>
            </template>
          </template>
          <div v-for="(field, index) in fields" :key="index">
            <template
              v-if="field.list.find((f) => includeFields.includes(f.type))"
            >
              <div class="field-title">{{ field.title }}</div>
              <draggable
                tag="ul"
                :list="field.list"
                :group="{ name: 'form', pull: 'clone', put: false }"
                ghost-class="ghost"
                :sort="false"
              >
                <template v-for="(item, cIndex) in field.list">
                  <li
                    class="field-label"
                    v-if="includeFields.includes(item.type)"
                    :key="'c_' + cIndex"
                  >
                    <a @click="handleFieldClick(item)">
                      <i class="icon iconfont" :class="item.icon"></i>
                      <span>{{ item.title || item.label }}</span>
                    </a>
                  </li>
                </template>
              </draggable>
            </template>
          </div>
        </div>
      </el-aside>
      <!-- 中间主布局 -->
      <el-container class="widget-container" direction="vertical">
        <el-header class="widget-container-header">
          <div>
            <template v-if="undoRedo">
              <el-button
                type="text"
                size="medium"
                icon="el-icon-refresh-left"
                :disabled="historySteps.index == 0"
                @click="widgetForm = handleUndo()"
                >撤销</el-button
              >
              <el-button
                type="text"
                size="medium"
                icon="el-icon-refresh-right"
                :disabled="historySteps.index == historySteps.steps.length - 1"
                @click="widgetForm = handleRedo()"
                >重做</el-button
              >
            </template>
          </div>
          <div style="display: flex; align-items: center">
            <!--<el-button v-if="toolbar.includes('import')"
                       type="text"
                       size="medium"
                       icon="el-icon-upload2"
                       @click="importJsonVisible = true">导入JSON</el-button>
            <el-button v-if="toolbar.includes('generate')"
                       type="text"
                       size="medium"
                       icon="el-icon-download"
                       @click="handleGenerateJson">生成JSON</el-button>-->
            <el-button
              type="text"
              size="medium"
              icon="el-icon-document"
              @click="handleSaveJson"
              >保存</el-button
            >
            <el-button
              v-if="toolbar.includes('preview')"
              type="text"
              size="medium"
              icon="el-icon-view"
              @click="handlePreview"
              >预览</el-button
            >
            <el-button
              v-if="toolbar.includes('clear')"
              class="danger"
              type="text"
              size="medium"
              icon="el-icon-delete"
              @click="handleClear"
              >清空</el-button
            >
            <slot name="toolbar"></slot>
          </div>
        </el-header>
        <el-main
          :style="{
            background:
              widgetForm.column.length == 0
                ? `url(${widgetEmpty}) no-repeat 50%`
                : '',
          }"
        >
          <widget-form
            ref="widgetForm"
            :data="widgetForm"
            :select.sync="widgetFormSelect"
            @change="handleHistoryChange(widgetForm)"
          ></widget-form>
        </el-main>
      </el-container>
      <!-- 右侧配置 -->
      <el-aside class="widget-config-container" :width="rightWidth">
        <el-tabs v-model="configTab" stretch>
          <el-tab-pane label="字段属性" name="widget" style="padding: 0 10px">
            <widget-config
              :data="widgetFormSelect"
              :default-values="defaultValues"
            ></widget-config>
          </el-tab-pane>
          <el-tab-pane
            label="表单属性"
            name="form"
            lazy
            style="padding: 0 10px"
          >
            <form-config :data="widgetForm"></form-config>
          </el-tab-pane>
        </el-tabs>
      </el-aside>
      <!-- 弹窗 -->
      <!-- 导入JSON -->
      <el-drawer
        title="导入JSON"
        :visible.sync="importJsonVisible"
        size="50%"
        append-to-body
        destroy-on-close
      >
        <monaco-editor
          v-model="importJson"
          keyIndex="import"
          height="82%"
        ></monaco-editor>
        <div class="drawer-foot">
          <el-button
            size="medium"
            type="primary"
            @click="handleImportJsonSubmit"
            >确定</el-button
          >
          <el-button
            size="medium"
            type="danger"
            @click="importJsonVisible = false"
            >取消</el-button
          >
        </div>
      </el-drawer>
      <!-- 生成JSON -->
      <el-drawer
        title="生成JSON"
        :visible.sync="generateJsonVisible"
        size="50%"
        append-to-body
        destroy-on-close
      >
        <monaco-editor
          v-model="option"
          keyIndex="generate"
          height="82%"
          :read-only="true"
        ></monaco-editor>
        <div class="drawer-foot">
          <el-button size="medium" type="primary" @click="handleGenerate"
            >生成</el-button
          >

          <el-popover placement="top" trigger="hover" width="350px">
            <el-form
              v-model="configOption"
              style="padding: 0 20px"
              label-suffix="："
              label-width="180px"
              label-position="left"
            >
              <el-form-item label="类型">
                <el-popover
                  placement="top-start"
                  trigger="hover"
                  content="复制json对象"
                  style="margin-right: 15px"
                >
                  <el-radio
                    slot="reference"
                    v-model="configOption.generateType"
                    label="json"
                    >json</el-radio
                  >
                </el-popover>
                <el-popover
                  placement="top-start"
                  trigger="hover"
                  content="复制string字符串，可直接用于后端保存无需再次处理。"
                >
                  <el-radio
                    slot="reference"
                    v-model="configOption.generateType"
                    label="string"
                    >string</el-radio
                  >
                </el-popover>
              </el-form-item>
              <el-form-item label="缩进长度-空格数量">
                <el-slider
                  v-model="configOption.space"
                  show-stops
                  :marks="{ 1: '1', 2: '2', 3: '3', 4: '4' }"
                  :min="1"
                  :max="4"
                  :step="1"
                ></el-slider>
              </el-form-item>
              <el-form-item label="引号类型">
                <el-switch
                  v-model="configOption.quoteType"
                  active-value="single"
                  inactive-value="double"
                  active-text="单引号"
                  inactive-text="双引号"
                ></el-switch>
              </el-form-item>
              <el-form-item label="移除key的引号">
                <el-switch v-model="configOption.dropQuotesOnKeys"></el-switch>
              </el-form-item>
              <el-form-item label="移除数字字符串的引号">
                <el-switch
                  v-model="configOption.dropQuotesOnNumbers"
                ></el-switch>
              </el-form-item>
            </el-form>
            <el-button
              size="medium"
              type="primary"
              @click="handleCopy"
              slot="reference"
              style="margin-left: 10px"
              >复制</el-button
            >
          </el-popover>
        </div>
      </el-drawer>
      <!-- 预览 -->
      <el-drawer
        title="预览"
        :visible.sync="previewVisible"
        size="60%"
        append-to-body
        :before-close="handleBeforeClose"
      >
        <avue-form
          ref="form"
          class="preview-form"
          :option="option"
          v-model="form"
          @submit="handlePreviewSubmit"
        ></avue-form>
        <div class="drawer-foot">
          <el-button size="medium" type="primary" @click="handlePreviewSubmit"
            >确定</el-button
          >
          <el-button size="medium" type="danger" @click="handleBeforeClose"
            >取消</el-button
          >
        </div>
      </el-drawer>
    </el-container>
  </div>
</template>

<script>
import fields from "./fieldsConfig.js";
import beautifier from "./utils/json-beautifier";
import MonacoEditor from "./utils/monaco-editor";
import widgetEmpty from "./assets/widget-empty.png";
import history from "./mixins/history";

import Draggable from "vuedraggable";

import WidgetForm from "./WidgetForm";
import FormConfig from "./FormConfig";
import WidgetConfig from "./WidgetConfig";

export default {
  name: "FormDesign",
  components: { Draggable, MonacoEditor, WidgetForm, FormConfig, WidgetConfig },
  mixins: [history],
  props: {
    options: {
      type: [Object, String],
      default: () => {
        return {
          column: [],
        };
      },
    },
    storage: {
      type: Boolean,
      default: false,
    },
    asideLeftWidth: {
      type: [String, Number],
      default: "270px",
    },
    asideRightWidth: {
      type: [String, Number],
      default: "380px",
    },
    showGithubStar: {
      type: Boolean,
      default: true,
    },
    toolbar: {
      type: Array,
      default: () => {
        return ["import", "generate", "preview", "clear"];
      },
    },
    undoRedo: {
      type: Boolean,
      default: true,
    },
    includeFields: {
      type: Array,
      default: () => {
        const arr = [];
        fields.forEach((f) => {
          f.list.forEach((c) => {
            arr.push(c.type);
          });
        });
        return arr;
      },
    },
    customFields: {
      type: Array,
    },
    defaultValues: {
      type: Object,
    },
  },
  watch: {
    options: {
      handler(val) {
        let options = val;
        if (typeof options == "string") {
          try {
            options = eval("(" + options + ")");
          } catch (e) {
            console.error("非法配置");
            options = { column: [] };
          }
        }
        this.transAvueOptionsToFormDesigner(options).then((res) => {
          this.widgetForm = { ...this.widgetForm, ...res };
        });
      },
      deep: true,
    },
  },
  computed: {
    leftWidth() {
      if (typeof this.asideLeftWidth == "string") {
        return this.asideLeftWidth;
      } else {
        return `${this.asideLeftWidth}px`;
      }
    },
    rightWidth() {
      if (typeof this.asideRightWidth == "string") {
        return this.asideRightWidth;
      } else {
        return `${this.asideRightWidth}px`;
      }
    },
  },
  data() {
    return {
      widgetEmpty,
      fields,
      widgetForm: {
        column: [],
        labelPosition: "left",
        labelSuffix: "：",
        labelWidth: 120,
        gutter: 0,
        menuBtn: true,
        submitBtn: true,
        submitText: "提交",
        emptyBtn: true,
        emptyText: "清空",
        menuPosition: "center",
      },
      option: {},
      configTab: "widget",
      widgetFormSelect: {},
      previewVisible: false,
      generateJsonVisible: false,
      importJsonVisible: false,
      importJson: {},
      form: {},
      configOption: {
        generateType: "json",
        space: 2,
        quoteType: "single",
        dropQuotesOnKeys: true,
      },
      history: {
        index: 0, // 当前下标
        maxStep: 20, // 最大记录步数
        steps: [], // 历史步数
      },
    };
  },
  mounted() {
    this.handleLoadStorage();
    this.handleLoadCss();
  },
  methods: {
    // 组件初始化时加载本地存储中的options(需开启storage),若不存在则读取用户配置的options
    async handleLoadStorage() {
      let options = this.options;
      if (typeof options == "string") {
        try {
          options = eval("(" + options + ")");
        } catch (e) {
          console.error("非法配置");
          options = { column: [] };
        }
      }
      if (!options.column) options.column = [];
      this.widgetForm = this.initHistory({
        index: 0,
        maxStep: 20,
        steps: [
          await this.transAvueOptionsToFormDesigner({
            ...this.widgetForm,
            ...options,
          }),
        ],
        storage: this.storage,
      });

      if (this.undoRedo) {
        window.addEventListener(
          "keydown",
          (evt) => {
            // 监听 cmd + z / ctrl + z 撤销
            if (
              (evt.metaKey && !evt.shiftKey && evt.keyCode == 90) ||
              (evt.ctrlKey && !evt.shiftKey && evt.keyCode == 90)
            ) {
              this.widgetForm = this.handleUndo();
            }

            // 监听 cmd + shift + z / ctrl + shift + z / ctrl + y 重做
            if (
              (evt.metaKey && evt.shiftKey && evt.keyCode == 90) ||
              (evt.ctrlKey && evt.shiftKey && evt.keyCode == 90) ||
              (evt.ctrlKey && evt.keyCode == 89)
            ) {
              this.widgetForm = this.handleRedo();
            }
          },
          false
        );
      }
    },
    // 加载icon
    handleLoadCss() {
      const head = document.getElementsByTagName("head")[0];
      const script = document.createElement("link");
      script.rel = "stylesheet";
      script.type = "text/css";
      script.href = "https://at.alicdn.com/t/font_1254447_zc9iezc230c.css";
      head.appendChild(script);
      // this.loadScript('css', 'https://at.alicdn.com/t/font_1254447_zc9iezc230c.css')
    },
    // Avue文档链接
    handleAvueDoc() {
      window.open("https://avuejs.com/doc/form/form-doc", "_blank");
    },
    // 左侧字段点击
    handleFieldClick(item) {
      const activeIndex =
        this.widgetForm.column.findIndex(
          (c) => c.prop == this.widgetFormSelect.prop
        ) + 1;
      let newIndex = 0;
      if (activeIndex == -1) {
        this.widgetForm.column.push(item);
        newIndex = this.widgetForm.column.length - 1;
      } else {
        this.widgetForm.column.splice(activeIndex, 0, item);
        newIndex = activeIndex;
      }

      this.$refs.widgetForm.handleWidgetAdd({ newIndex });
    },
    // 预览 - 弹窗
    handlePreview() {
      if (!this.widgetForm.column || this.widgetForm.column.length == 0)
        this.$message.error("没有需要展示的内容");
      else {
        this.transformToAvueOptions(this.widgetForm, true).then((data) => {
          this.option = data;
          this.previewVisible = true;
        });
      }
    },
    // 导入JSON - 弹窗 - 确定
    handleImportJsonSubmit() {
      try {
        this.transAvueOptionsToFormDesigner(this.importJson).then((res) => {
          this.widgetForm = res;
          this.importJsonVisible = false;
          this.handleHistoryChange(this.widgetForm);
        });
      } catch (e) {
        this.$message.error(e.message);
      }
    },
    // 生成JSON - 弹窗
    handleGenerateJson() {
      this.transformToAvueOptions(this.widgetForm).then((data) => {
        this.option = data;
        this.generateJsonVisible = true;
      });
    },
    // 保存
    handleSaveJson() {
      this.transformToAvueOptions(this.widgetForm).then((data) => {
        this.$emit("submit", data);
      });
    },
    // 生成JSON - 弹窗 - 确定
    handleGenerate() {
      this.transformToAvueOptions(this.widgetForm).then((data) => {
        if (
          this.configOption.generateType &&
          this.configOption.generateType == "string"
        )
          this.$emit(
            "submit",
            beautifier(data, {
              minify: true,
              ...this.configOption,
            })
          );
        else this.$emit("submit", data);
      });
    },
    // 生成JSON - 弹窗 - 拷贝
    handleCopy() {
      this.transformToAvueOptions(this.widgetForm).then((data) => {
        this.$Clipboard({
          text: beautifier(data, {
            minify: true,
            ...this.configOption,
          }),
        })
          .then(() => {
            this.$message.success("复制成功");
          })
          .catch(() => {
            this.$message.error("复制失败");
          });
      });
    },
    // 预览 - 弹窗 - 确定
    handlePreviewSubmit(form, done) {
      if (done) {
        this.$alert(this.form)
          .then(() => {
            done();
          })
          .catch(() => {
            done();
          });
      } else {
        this.$refs.form.validate((valid, done) => {
          if (valid)
            this.$alert(this.form)
              .then(() => {
                done();
              })
              .catch(() => {
                done();
              });
        });
      }
    },
    // 预览 - 弹窗 - 关闭前
    handleBeforeClose() {
      this.$refs.form.resetForm();
      this.form = {};
      this.previewVisible = false;
    },
    // 清空
    handleClear() {
      if (
        this.widgetForm &&
        this.widgetForm.column &&
        this.widgetForm.column.length > 0
      ) {
        this.$confirm("确定要清空吗？", "警告", {
          type: "warning",
        })
          .then(() => {
            this.$set(this.widgetForm, "column", []);
            this.$set(this, "form", {});
            this.$set(this, "widgetFormSelect", {});
            this.handleHistoryChange(this.widgetForm);
          })
          .catch(() => {});
      } else this.$message.error("没有需要清空的内容");
    },
    // 表单设计器配置项 转化为 Avue配置项
    transformToAvueOptions(obj, isPreview = false) {
      const _this = this;
      return new Promise((resolve, reject) => {
        try {
          const data = _this.deepClone(obj);
          for (let i = 0; i < data.column.length; i++) {
            const col = data.column[i];

            if (isPreview) {
              // 预览调整事件中的this指向
              let event = ["change", "blur", "click", "focus"];
              event.forEach((e) => {
                if (col[e])
                  col[e] = eval((col[e] + "").replace(/this/g, "_this"));
              });
              if (col.event)
                Object.keys(col.event).forEach(
                  (key) =>
                    (col.event[key] = eval(
                      (col.event[key] + "").replace(/this/g, "_this")
                    ))
                );
            }

            if (
              col.type == "dynamic" &&
              col.children &&
              col.children.column &&
              col.children.column.length > 0
            ) {
              const c = col.children.column;
              c.forEach((item) => {
                delete item.subfield;
              });
              this.transformToAvueOptions(col.children, isPreview).then(
                (res) => {
                  col.children = res;
                }
              );
            } else if (col.type == "group") {
              if (!data.group) data.group = [];

              const group = {
                label: col.label,
                icon: col.icon,
                prop: col.prop,
                arrow: col.arrow,
                collapse: col.collapse,
                display: col.display,
              };
              this.transformToAvueOptions(col.children, isPreview).then(
                (res) => {
                  group.column = res.column;
                  data.group.push(group);
                }
              );
              data.column.splice(i, 1);
              i--;
            } else if (
              ["checkbox", "radio", "tree", "cascader", "select"].includes(
                col.type
              )
            ) {
              if (col.dicOption == "static") {
                delete col.dicUrl;
                delete col.dicMethod;
                delete col.dicQuery;
                delete col.dicQueryConfig;
              } else if (col.dicOption == "remote") {
                /*delete col.dicData
                if (col.dicQueryConfig && col.dicQueryConfig.length > 0) {
                  const query = {}
                  col.dicQueryConfig.forEach(q => {
                    if (q.key && q.value) query[q.key] = q.value
                  })
                  col.dicQuery = query
                  delete col.dicQueryConfig
                } else delete col.dicQueryConfig*/
              }
              delete col.dicOption;
            } else if (["upload"].includes(col.type)) {
              if (col.headersConfig && col.headersConfig.length > 0) {
                const headers = {};
                col.headersConfig.forEach((h) => {
                  if (h.key && h.value) headers[h.key] = h.value;
                });

                col.headers = headers;
              } else delete col.headers;
              delete col.headersConfig;

              if (col.dataConfig && col.dataConfig.length > 0) {
                const data = {};
                col.dataConfig.forEach((h) => {
                  if (h.key && h.value) data[h.key] = h.value;
                });
                col.data = data;
              } else delete col.data;
              delete col.dataConfig;
            }
          }
          resolve(data);
        } catch (e) {
          reject(e);
        }
      });
    },
    // Avue配置项 转化为 表单设计器配置项
    transAvueOptionsToFormDesigner(obj) {
      if (typeof obj == "string") obj = eval("(" + obj + ")");
      const data = this.deepClone(obj);
      return new Promise((resolve, reject) => {
        try {
          if (data.column && data.column.length > 0) {
            data.column.forEach((col) => {
              if (
                col.type == "dynamic" &&
                col.children &&
                col.children.column &&
                col.children.column.length > 0
              ) {
                const c = col.children.column;
                c.forEach((item) => {
                  item.subfield = true;
                });
                this.transAvueOptionsToFormDesigner(col.children).then(
                  (res) => {
                    col.children = res;
                  }
                );
              } else if (
                ["checkbox", "radio", "tree", "cascader", "select"].includes(
                  col.type
                )
              ) {
                if (
                  !col.dicData &&
                  col.dicQuery &&
                  typeof col.dicQuery == "object"
                ) {
                  const arr = [];
                  for (let key in col.dicQuery) {
                    arr.push({
                      key,
                      value: col.dicQuery[key],
                      $cellEdit: true,
                    });
                  }
                  col.dicQueryConfig = arr;
                }
                if (col.dicUrl) col.dicOption = "remote";
                else col.dicOption = "static";
                if (!col.dicData) col.dicData = [];
              } else if (["upload"].includes(col.type)) {
                if (col.headers && typeof col.headers == "object") {
                  const arr = [];
                  for (let key in col.headers) {
                    arr.push({
                      key,
                      value: col.headers[key],
                      $cellEdit: true,
                    });
                  }
                  col.headersConfig = arr;
                } else col.headersConfig = [];

                if (col.data && typeof col.data == "object") {
                  const arr = [];
                  for (let key in col.data) {
                    arr.push({
                      key,
                      value: col.data[key],
                      $cellEdit: true,
                    });
                  }
                  col.dataConfig = arr;
                } else col.dataConfig = [];
              }
            });
          }
          if (data.group && data.group.length > 0) {
            for (let i = 0; i < data.group.length; i++) {
              if (!data.column) data.column = [];
              const col = data.group[i];

              const group = {
                type: "group",
                label: col.label,
                icon: col.icon,
                prop: col.prop,
                arrow: col.arrow,
                collapse: col.collapse,
                display: col.display,
              };
              this.transAvueOptionsToFormDesigner(col).then((res) => {
                group.children = res;
                data.column.push(group);
              });
            }
            delete data.group;
          }
          resolve(data);
        } catch (e) {
          reject(e);
        }
      });
    },
    async getData(type = "json", option = {}) {
      if (type == "string")
        return beautifier(await this.transformToAvueOptions(this.widgetForm), {
          minify: true,
          ...option,
        });
      else if (type == "app") {
        const option = await this.transformToAvueOptions(this.widgetForm);
        this.parseJson(option);
        return option;
      } else return await this.transformToAvueOptions(this.widgetForm);
    },
    parseJson(jsonObj) {
      // 循环所有键
      for (var key in jsonObj) {
        //如果对象类型为object类型且数组长度大于0 或者 是对象 ，继续递归解析
        var element = jsonObj[key];
        if (
          (element && element.length > 0 && typeof element == "object") ||
          typeof element == "object"
        ) {
          this.parseJson(element);
        } else if (typeof element == "function") {
          jsonObj[key] = element + "";
        }
      }
    },
  },
};
</script>

<style lang="scss">
@import "./styles/index.scss";
</style>
